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Self-protected flux-cored wire

A flux-cored wire, self-protection technology, applied in welding media, welding equipment, welding/cutting media/materials, etc., can solve the problems of expensive price, limited application scope, etc., and achieve low price, wide application prospects, and high cost performance of materials. Effect

Inactive Publication Date: 2010-06-09
CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such products are expensive, which limits the scope of application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 2

[0033] The drug core components are calculated by mass percentage as:

[0034] Graphite: 0.4%, metal manganese: 40%, metal chromium: 28%, metal nickel: 5%, metal molybdenum: 5%, heavy rare earth ferrosilicon: 2%, vanadium iron: 3%, niobium iron: 5.6%, metal Cobalt: 0%, Minerals: 20%.

[0035] The steel strip is 0.3×14, and the ratio is 48%, to make a Φ2.8 self-shielded flux cored wire.

[0036] There are five layers of surfacing welding, and samples are taken on the surfacing welding surface for chemical analysis. The chemical composition of the surfacing welding deposited metal is shown in Table 2:

[0037] Table 2

[0038] Alloy element

specific Embodiment 3

[0039] The drug core components are calculated by mass percentage as:

[0040] Graphite: 0.4%, manganese metal: 33%, chromium metal: 31%, nickel metal: 3%, molybdenum metal: 1.6%, heavy rare earth ferrosilicon: 2%, ferrovanadium: 9%, ferroniobium: 0%, metal Cobalt: 0%, Minerals: 20%.

[0041] The steel strip is 0.3×14, and the ratio is 48%, to make a Φ2.8 self-shielded flux cored wire.

[0042] There are five layers of surfacing welding, and samples are taken on the surfacing welding surface for chemical analysis. The chemical composition of the surfacing welding deposited metal is shown in Table 3:

[0043] table 3

[0044] alloy element

Embodiment 1

[0045] In embodiment 1, metallographic structure such as figure 2 As shown, the organization should obtain dispersed carbide particles on its austenite matrix during water cooling, which is conducive to uniform deformation and welding stress release. During use, under the action of pressure and impact, the surface layer continuously produces work hardening, that is, austenite transforms into induced martensite, forming a wear-resistant structure with inner toughness and outer hardness. The mechanical properties are shown in Table 4:

[0046] Table 4 Mechanical properties of surfacing deposited metal

[0047] σ b (MP)

[0048] Deposited metal has a large yield strength ratio and toughness, low yield strength is conducive to welding stress release, good impact toughness is conducive to material deformation, and reduces surfacing stress and crack tendency. After one layer of surfacing, there are longitudinal and transverse cracks on the surfacing surface. After two...

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Abstract

The invention provides a self-protected flux-cored wire, relating to a welding technology. The self-protected flux-cored wire is used for surfacing, repairing and bottoming a quick-wear part of manganese steel material, wherein the diameter of the quick-wear part is Phi 2.8mm. The core comprises the following components based on parts by percentage: 0.2-0.6% of C, 16-53% of Mn, 17-40% of Cr, 2-9% of Ni, 1.5-10% of Mo, 1-5% of heavy rare earth silicon iron, 0-6% of V, 0-6% of Nb, 0-6% of Co and 20% of mineral substance. A steel band adopts 0.3*14, and proportion is less than or equal to 48%. The flux-cored wire has low price, high material cost performance, can be directly surfaced on the surface of the high manganese steel, does not need transition material, and has wide application prospect.

Description

technical field [0001] The invention relates to the field of welding technology, and relates to a self-protecting flux-cored welding wire used for repairing and bottoming of manganese steel hammer heads. Background technique [0002] Medium and high manganese steel is widely used and has a long history of anti-wear steel. After being subjected to impact load or high pressure, the surface will rapidly harden, but the core still maintains high plasticity, so it has good wear resistance and impact resistance. It is widely used in mining, metallurgy, construction, electric power, railway, transportation and other industries to manufacture parts that require wear resistance and impact resistance, such as hammer heads of hammer crushers, jaw plates of jaw crushers, Excavator bucket teeth, pulverizer liners, crawlers, railway switches, etc. However, the industrial and mining conditions that manganese steel serves are harsh, and most of the parts made of manganese steel are vulnera...

Claims

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Application Information

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IPC IPC(8): B23K35/22
Inventor 王清宝白波汤春天王川蒋旻石立鹏段斌刘景凤
Owner CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
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